#include <iostream>
using namespace std;
class Box
{
   public :
   Box(int,int,int);
   int volume( );
   private :
   int height;
   int width;
   int length;
};
//??????????//?????????
Box::Box(int h,int w,int len) //?????????????
{
   height=h;
   width=w;
   length=len;
}
int Box::volume( ) //?????????
{
   return (height*width*length);
}
int main( )
{
   Box box1(12,25,30); //????box1,???box1???????
   cout<<"The volume of box1 is "<<box1.volume( )<<endl;
   Box box2(15,30,21); //????box2,???box2???????
   cout<<"The volume of box2 is "<<box2.volume( )<<endl;
   return 0;
}